1. Accurate and Efficient: The fitting algorithm of power standing wave meter based on the characteristics of the detection diode, combined with dual- segmentation detection, produces accurate results with an accuracy 5% over the entire power range from 0.5W to 150W. The high-speed averaging detection allows for real-time efficiency display.2. Multiple Display : With five different interface display , users can select their preferred display option with a single click. This feature of power swr meter provides greater customization and personalization to the user experience.3. Audible Alert: The short wave standing wave meter exceeding 2.0 triggers a beep alarm, alerting users to potential issues.4. Compatibility with Open-Source Software: The GM328A supports G8GYW open-source software code, allowing for freedom in modifying the code and adding additional features. The USB firmware upgrade eliminates the need for a special burner, providing easy and convenient upgrades.5. Long Battery Life and Multi-Functional Keypad: The high frequency swr meter built-in lithium battery provides more than 50 hours of use per charge. The multi-functional keypad provides an interactive way to add functionality and make the user experience even more fun.Insertion loss:Less than 0.12dB. Insert standing wave:1.6-30MHz less than equal 1.02; 30-50MHz less than equal 1.05:ELECTRICALModel Number:Display Power Standing Wave MeterFrequency range:1.6-50MHzPower measurement range:0.5W-150WStanding wave measurement range:1.0-99.9Measurement accuracy: 5%Impedance:50ohmStanding wave alarm: equal 2.0 (with shutdown function)RF interface type:SL16-M or N (default M)Display content:forward power;standing wave; antenna end power; efficiencyPower supply:built-in 3.7V/1000mAh rechargeable lithium battery or USB type-cShutdown power consumption:Less than 0.1uAScreen size:0.96 inchesScreen type:OLEDData communication:USB type-cFirmware upgrade:supportSpecial reminder:It is recommended not to exceed 110W for continuous transmission in FM or AM mode; SSB or CW can work under 200W power for a long time; exceeding 500W will damage the detection componentsInstructions for use: Long press to switch the machine, short press to switch the display interface, double click to switch the standing wave alarm;There are a total of 5 display interfaces, which are automatically saved and automatically recalled at startup.Charging red light display, fully light offColour:BlackMaterial:Aluminum alloySize:Machine size:88mmx64mmx38mm/3.46x2.51x1.49inch (excluding the protruding part)Package Contents:1 * SWR MeterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.